Chemical element/Talk

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"A chemical element (sometimes called simply element) is a unique atom characterized by the number of protons in its nucleus"

an element is not a unique atom. That implies that each element has exactly one atom. Blatantly not true. I was searching for some better wording however...

"A chemical element is characterised by a given number of nuclear protons - it represents the class of all atoms that have that number of protons in their nucleus."